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An air horn consists of a flaring metal or plastic horn or trumpet (called the "bell") attached to a small air chamber containing a metal reed or diaphragm in the throat of the horn. Compressed air flows from an inlet line through a narrow opening past the reed or diaphragm, causing it to vibrate, which creates sound waves. The flaring horn ...
All foghorns use a vibrating column of air to create an audible tone, but the method of setting up this vibration differs. Some horns, such as the Daboll trumpet, used vibrating plates or metal reeds, a similar principle to a modern electric car horn. Others used air forced through holes in a rotating cylinder or disk, in the same manner as a ...
The vuvuzela / v uː v uː ˈ z ɛ l ə / is a horn, with an inexpensive injection-moulded plastic shell about 65 centimetres (2 ft) long, which produces a loud monotone note, typically around B♭ 3 [2] (the first B♭ below middle C). [3]
The north terminus is approximately 26 miles (40 km) northwest of Springer Mountain, which is the southern terminus of the Appalachian Trail. [2]Georgia has about 164 miles (260 km) of the trail, and Alabama contains the other 171 miles (280 km) of the 335-mile-long (540 km) trail.
After 1935, the Luftwaffe had built a naval air station and the "Hörnum Military Settlement (Militärische Siedlung Hörnum)" as a preparation for the war. The outbreak of war prevented the project from being finished and so the gaps in the colony, which was designed as a garden city , have since been filled with post-war buildings.
The diaphone horn was based directly on the organ stop of the same name invented by Robert Hope-Jones, creator of the Wurlitzer organ. [1] [2] Hope-Jones' design was based on a piston that was closed only at its bottom end and had slots, perpendicular to its axis, cut through its sides; the slotted piston moved within a similarly slotted cylinder.
A compression driver is a small specialized diaphragm loudspeaker which generates the sound in a horn loudspeaker. It is attached to an acoustic horn, a widening duct which serves to radiate the sound efficiently into the air. It works in a "compression" mode; the area of the loudspeaker diaphragm is significantly larger than the throat ...
The sound of the flugelhorn has been described as halfway between a trumpet and a French horn, whereas the cornet's sound is halfway between a trumpet and a flugelhorn. [6] The flugelhorn is as agile as the cornet but more difficult to control in the high register (from approximately written G 5 ), where in general it locks onto notes less easily.
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